A starloop communication network for intraestablishment communication in a multiterminal processing system includes a digital switch as its central terminal. In the basic mode, the switch is configured so that the input from each terminal is switched back to the next terminal forming a loop network....http://www.google.com.au/patents/US4491838?utm_source=gb-gplus-sharePatent US4491838 - Starloop communication network and control system therefor
